The Afon Cerist is a small river that flows from underneath Craig Portas, the cliffs on the north side of Maesglase mountain, to meet the River Dyfi at Dinas Mawddwy.[1] It forms the northern border of the Dyfi Hills.

Afon Cerist
The valley of the Afon Cerist seen from Cribin Fawr
Location
Country	Wales
Physical characteristics
Source	Maesglase
• elevation	1,419 ft (433 m)
Mouth
• location	Dinas Mawddwy
• coordinates	52°43′14″N 3°41′15″W
Length	4.7 miles (7.6 km)

References